创立父工程
父工程pom.xml
<packaging>pom</packaging> <!-- 对立治理jar包版本 --> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> <junit.version>4.12</junit.version> <log4j.version>1.2.17</log4j.version> <lombok.version>1.16.18</lombok.version> <mysql.version>5.1.47</mysql.version> <druid.version>1.1.21</druid.version> <mybatis.spring.boot.version>1.3.0</mybatis.spring.boot.version> </properties> <dependencyManagement> <!-- 子模块继承之后，提供作用：锁定版本+子modlue不必写groupId和version --> <dependencies> <!--spring boot 2.2.2--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-dependencies</artifactId> <version>2.2.2.RELEASE</version> <type>pom</type> <scope>import</scope> </dependency> <!--spring cloud Hoxton.SR1--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Hoxton.SR1</version> <type>pom</type> <scope>import</scope> </dependency> <!--spring cloud alibaba 2.1.0.RELEASE--> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-alibaba-dependencies</artifactId> <version>2.1.0.RELEASE</version> <type>pom</type> <scope>import</scope> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>${druid.version}</version> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>${mybatis.spring.boot.version}</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>${junit.version}</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>${lombok.version}</version> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <fork>true</fork> <addResources>true</addResources> </configuration> </plugin> </plugins> </build>创立子模块 cloud-provider-payment8001
pom.xml
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> </dependency> <!--eureka client--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <!--如果没写版本,从父层面找,找到了就间接用,全局对立--> </dependency> <!--mysql-connector-java--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <!--jdbc--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <!--热部署--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies>application.yml
server: port: 8001spring: application: name: cloud-payment-service datasource: #以后数据源操作类型 type: com.alibaba.druid.pool.DruidDataSource #mysql驱动包 driver-class-name: org.gjt.mm.mysql.Driver url: jdbc:mysql://localhost:3306/cloud2020?useUnicode=true&characterEncoding=utf8&useSSL=false username: root password: rootmybatis: mapperLocations: classpath:mapper/*.xml #所有entity别名类所在包 type-aliases-package: com.yu.springcloud.entities主启动类
@SpringBootApplicationpublic class PaymentMain8001 { public static void main(String[] args) { SpringApplication.run(PaymentMain8001.class, args); }}实体类
@Data@AllArgsConstructor@NoArgsConstructorpublic class Payment implements Serializable { private Long id; private String serial;}对立返回后果CommonResult
@Data@AllArgsConstructor@NoArgsConstructorpublic class CommonResult<T> { private Integer code; private String message; private T data; public CommonResult(Integer code,String message){ this(code,message,null); }}dao层
@Mapperpublic interface PaymentDao { int create(Payment payment); Payment getPaymentById(Long id);}mapper(在resources目录下新建/mapper/PaymentMapper.xml)
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="com.yu.springcloud.dao.PaymentDao"> <insert id="create" parameterType="com.yu.springcloud.entities.Payment" useGeneratedKeys="true" keyProperty="id"> insert into payment(serial) values(#{serial}); </insert> <resultMap id="BaseResultMap" type="com.yu.springcloud.entities.Payment"> <id column="id" property="id" jdbcType="BIGINT"></id> <id column="serial" property="serial" jdbcType="VARCHAR"></id> </resultMap> <select id="getPaymentById" parameterType="Long" resultMap="BaseResultMap"> select * from payment where id = #{id}; </select></mapper>service
public interface PaymentService { public int create(Payment payment); public Payment getPaymentById(@Param("id")Long id);}@Servicepublic class PaymentServiceImpl implements PaymentService { @Resource private PaymentDao paymentDao; @Override public int create(Payment payment) { return paymentDao.create(payment); } @Override public Payment getPaymentById(Long id) { return paymentDao.getPaymentById(id); }}controller
@RestController@Slf4jpublic class PaymentController { @Resource private PaymentService paymentService; @Value("${server.port}") private String serverPort; @GetMapping(value = "/payment/lb") public String getPaymentLb(){ return serverPort; } @PostMapping(value = "/payment/create") public CommonResult create(@RequestBody Payment payment){ int result = paymentService.create(payment); log.info("*****插入后果："+result); if (result>0){ return new CommonResult(200,"插入胜利,serverPort"+serverPort,result); }else { return new CommonResult(-1,"插入失败,serverPort"+serverPort,result); } } @GetMapping(value = "/payment/get/{id}") public CommonResult getPaymentById(@PathVariable("id") Long id){ Payment payment = paymentService.getPaymentById(id); log.info("*****查问后果"+payment); if (payment!=null){ return new CommonResult(200,"查问胜利,serverPort:"+serverPort,payment); }else { return new CommonResult(-1,"没有相应记录，查问ID为："+id,null); } }}创立cloud-consumer-order80子模块
pom.yml
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!--热部署--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies>application.yml
server: port: 8090spring: application: name: cloud-order-service创立entities(将cloud-provider-payment8001工程下的entities包下的两个实体类复制过去)
主启动类
@SpringBootApplicationpublic class OrderMain80 { public static void main(String[] args) { SpringApplication.run(OrderMain80.class, args); }}在写controller类之前，先理解一下RestTemplate
概述：RestTemplate提供了多种便携拜访近程Http服务的办法，是一种简略便携的拜访restful服务模板类，是Spring提供的用于拜访Rest服务的客户端模板工具集。
应用：（url,requestMap,ResponseBean.class）这三个参数别离代表Rest申请地址、申请参数、Http响应转换被转换的对象类型
新建一个config配置类
@Configurationpublic class ApplicationContextConfig { @Bean public RestTemplate restTemplate() { return new RestTemplate(); }}controller
@RestController@Slf4jpublic class OrderController { public static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE"; @Resource private RestTemplate restTemplate; @Resource private DiscoveryClient discoveryClient; @GetMapping(value = "/consumer/payment/lb") public String paymentLB(){ List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE"); if (instances == null || instances.size()<=0){ return null; } ServiceInstance serviceInstance = loadBalancer.instances(instances); URI uri = serviceInstance.getUri(); return restTemplate.getForObject(uri+"/payment/lb", String.class); } @PostMapping(value = "/consumer/payment/create") public CommonResult<Payment> create(@RequestBody Payment payment) { return restTemplate.postForObject(PAYMENT_URL + "/payment/create", payment, CommonResult.class); }}创立cloud-api-commons模块
存在的问题：零碎中有重复部分
pom.xml
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <!-- 当optional为true则阐明该依赖禁止依赖传递 <optional>true</optional> --> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>cn.hutool</groupId> <artifactId>hutool-all</artifactId> <version>5.1.1</version> </dependency> </dependencies>将entities上面的两个实体类放入commons模块
打包commons
这就能够在下面两个子模块中的entities包删除，批改其pom文件，引入cloud-api-commons包即可
<dependency> <groupId>com.yu.springcloud</groupId> <artifactId>cloud-api-commons</artifactId> <version>1.0-SNAPSHOT</version> </dependency>